Awl motion



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l rami: EMILE vanois,y or rH2M/nannat, MASSACHUSETTS, `assiettes To vHalimi, sHon MACHINERY COM/PANY, LYNN, .llllbSACHUSE'ITS,l [a 'CRPORATION OF MASSA- crrusnmtrsi To all whom t may conce/m.'

Be it known that l, lfnmx EMILE Vaters, a citizen ot the United "States, residing at Haverhill, countyoiE Essex, State of Massachusetts, have invented a certain new and useful improvement in .erwl lll/lotions7 of which the iollowing is a specification, reiference being had therein tothe accompanying drawings. 'K

My inventionrelates to an awl feed for sewino' machines oiE the type in which the work is fed by the action of an awl.` rllie particular object otl the invention is to provide actuating mechanism for the awl Yteed which shall be simple and e'liiective and capable ot being runat a high' rate ot speed. rll`he mechanism may be made very strong` and is without links so that there is no lost motion and the mechanism will operate perfectly in intrd ,thick material as well as in sott stock. The forward and backward 'feeding movements olf the awl are given it by a cam while the penetrating and retracting movements are produced by a variable speed. rotating crank. This is a wholly novel arrangement and contributes greatly to the speed and smoothness oit the machine. -ln the following description no reference is made to theother parts of the sewing machine of. which the awl feed forming my present invention is a part, as an understanding ot the details oi the remainder of the machine is not necessary for the understanding of the present invention.` n The invention will be 'lully understood from the following description whenA taken in connection with the accompanying draw'- ings andthe novel features thereotl will be pointed out and clearly defined in 'the claims at the close of this specification.

In the drawings, Fig 1 is a top plan vview partly in section ot a portion of a sewing machine embodying my invention.

Fig, 2 is a vertical elevation partly in section of the parts shown in Fig. 1.

` Fig. 3 shows the parts in` anotherposition. Fig. 4 is a detail of' the mechanism by which the awl sector is actuated, the.. parts being in the position as shown in Fig. 3.

Fig. Bis a detailshowing a modified form c of construction.

Referring nowto the drawings,4 at A is shown the needleand B the work table and at C the looper. The main shaft of the ma- Specincation of Letters Patent. Panted .June 6, Application filed August 1, 1.918. SerialNo. 247,748.

AWL morren.

gular velocity as comparedwith the angular velocity of the main shaft D whichis conetant.

The `shafts A, and'flly are parallel but out'otaXial alinement and carry, rel .i

sp'ectively. the cranks F .andv 11 provided respectively with 'stud-pins connected by a lpitman in the form ot a'disk G apertured to receive them, as represented more particu-v larly inFig. 1. Variable rotary motion is imparted to the shalt E from the' nnain-v shaft D in a manner well known, asfdisclosed tor instanceD in ther United States pat# ent to McCloskey, No. 184,621.4of Novem? ter 21, i876. f

At 12 is shown the awl and at 13 the awl sector oscillatablel on the awl shaftl car` ried by a slide 16. 'The said slidel is mounted in ways 17 secured to affixed part o'l the machine. The movement of `the slide 16 is parallel with the axis of thedillerential shaft E. On the said dilierential shaft is located a .cam 18 in the groove of which'y travels a cam roll 19 mountedonthe rear end ol a lever 20. The lever 2O is pivoted at 21 to a fixed portion of the machine and is slotted as shown at k22 to receive a block 23 pivoted at 24- to a lever link 25. lever link25 is provided with a handle 26 by means of which ythe block may be moved in the slot 22. The other r end of the The ward movement after the awl has been withdrawn from the work, the whole movement being accomplished by one revolution of the diferei'itial shaft E and having variations in velocity corresponding to the variations in angular velocity of the differential shaft.

`The awl sectoris oscillated about the awl shalt 15 by means of a connecting rod 29 the lower end of which is formed into a socket 30 which surrounds a ball 31 secured to the awl sector. The other end of the connecting rod is secured. to the ball race 3 kof a ll. In combination, ra shaft, a crank on said shaft, a slide, an oscillatable awl sector mounted thereon, means to actuate the slideY a connecting rod having a universal joint connection with the sector and there being spherical proximate bearing surfaces for the crank and connecting rod, anda self-aligning ball bearing interposed between the crank and the connecting rod.

l2. In a device for operating upon mate.V

rial, a penetrating element, a rocking carrier therefor mounted to perform feeding movements in the direction of the axis of its rocking movements, means for imparting to said element work penetrating and withdrawing motion including a rotary actuating member and a single element pitman connection .between the saine and said carrier, and mechanism for rimparting to said element work teedin motion, said means acting during said ieeding motion to compensate for changing relative position ot said element thereto whereby said element may remain substantially stationary relative to the work durino` such feeding motion.

i3. n an awl feed mechanism, an awl, a rocking carrier therefor, a rotary crank for imparting to said awl work penetrating and withdrawing motion a direct pitman connection between said crank and carrier, and mechanism for imparting to said awlwoik feeding motion, said crank movingduring Asaid feeding motion to compensate for ch'angf ing `position ot said awl thereto whereby said awl may remain substantially stationary relative to the Work during such 4feeding' motion.

14. ln an awl feed mechanism, an oscillatable curved awl, a carrier therefor, means including a rotary actuating member `and a single element pitman connection between it and said carrier for oscillating said awl to penetrate and withdraw from the Work, and

mechanism for imparting to said awl worin :teeoling motion, said means acting during said feeding motion to compensate tor changing relative position of said awl thereto whereby said awl may remain substantially unoscillatedy during said feeding inotion. f

l5. In an awl t'eed'inechanism, an oscillatable curved awl and a carrier therefor, a variable speed crank and a pitman connection between the same and said carrier tor oscillating said awl to ypenetrate and with-y draw from the worl and mechanism tor iniparting to said awl work feeding motion,y said crank moving during said 'feeding niotion to compensate for changing position of said awl whereby said awl may remain sub# stantially i unoscillated during said feeding motion.

In testimony whereof Iwafix my signature.

FELIX EMLE VALOIS. 

